@article{TIMM_2021_27_4_a15,
     author = {M. Sh. Shabozov and G. A. Yusupov and J. J. Zargarov},
     title = {On the best simultaneous polynomial approximation of functions and their derivatives in {Hardy} spaces},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {239--254},
     year = {2021},
     volume = {27},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2021_27_4_a15/}
}